Old? No age limit set presently (3,2,4,4)
I believe the answer is:
all in good time
'presently' is the definition.
'old? no age limit set' is the wordplay.
'set' indicates an anagram (instruction to set the letters).
'old'+'no'+'age'+'limit'='oldnoagelimit'
'oldnoagelimit' with letters rearranged gives 'ALL IN GOOD TIME'.
(Other definitions for all in good time that I've seen before include "eventually?" , "Please be patient!" , "Soon enough" , "No sooner than is appropriate" , "In due course" .)